Aritmetica pratica
A practical arithmetic and geometry manual by Giulio Bassi, revised by Gioseffo Porcelli and printed at Piacenza in 1765 for students, surveyors and tradesmen. The engraved plates group numbered figures on one sheet: right triangles with lettered vertices, circles divided by radii, a tripod-mounted levelling instrument, and ruled tables of digits useful as diagram and grid material.
